System and method for gas treatment

1. A system, comprising:

an acid gas removal (AGR) system configured to remove an acid gas from an untreated syngas to generate a treated syngas,

a hydrogen separation system configured to receive the treated syngas to generate a non-permeate and a permeate;

a non-permeate cooler configured to cool the non-permeate via heat exchange with a coolant to produce a non-permeate discharge; and

an expander configured to expand the non-permeate discharge to generate a cooled non-permeate, wherein the AGR system comprises a solvent chiller configured to cool a solvent via heat exchange with the cooled non-permeate to produce a heated non-permeate.

2. The system of claim 1 , wherein the hydrogen separation system comprises a membrane separation system configured to generate the non-permeate and the permeate, wherein a first hydrogen concentration of the non-permeate is less than a second hydrogen concentration of the permeate.

3. The system of claim 1 , wherein only the solvent chiller is used in the AGR system to cool the solvent.

4. The system of claim 1 , wherein the AGR system comprises an untreated syngas cooler configured to cool the untreated syngas via heat exchange with the cooled non-permeate from the solvent chiller.

5. The system of claim 1 , comprising a pressure swing adsorption (PSA) system configured to receive the permeate to generate a tail gas and a hydrogen-rich stream.

6. The system of claim 5 , comprising a compressor configured to compress the tail gas to generate a compressed tail gas.

7. The system of claim 6 , wherein the expander and the compressor are coupled together such that the expander generates power to drive the compressor.

8. The system of claim 6 , comprising a gas turbine engine configured to receive a mixture of the compressed tail gas and the heated non-permeate from the solvent chiller.

9. The system of claim 6 , comprising a duct burner of a heat recovery steam generator (HRSG), wherein the duct burner is configured to combust the compressed tail gas, or a mixture of the compressed tail gas and the heated non-permeate.

10. The system of claim 1 , comprising a non-permeate heat exchanger of a low temperature gas cooling (LTGC) system, wherein the non-permeate heat exchanger is configured to cool the untreated syngas via heat exchange with the heated non-permeate from the solvent chiller.

11. A system, comprising:

a gas treatment system, comprising:

a hydrogen separation system configured to generate a non-permeate;

a non-permeate cooler configured to cool the non-permeate via heat exchange with a coolant to produce a non-permeate discharge;

an expander configured to expand the non-permeate discharge to generate a cooled non-permeate; and

a solvent chiller configured to cool a solvent via heat exchange with the cooled non-permeate; and

a gas treatment controller configured to control the gas treatment system to maintain a temperature of the solvent below a threshold.

12. The system of claim 11 , comprising a flow control valve configured to adjust a flow of the coolant used to cool the non-permeate via heat exchange in the non-permeate cooler.

13. The system of claim 11 , comprising a bypass valve configured to adjust a bypass flow of the non-permeate around the expander.

14. A method, comprising:

generating a non-permeate in a hydrogen separation system;

cooling the non-permeate via heat exchange with a coolant in a non-permeate cooler to produce a non-permeate discharge;

expanding the non-permeate discharge in an expander to generate a cooled non-permeate;

cooling a solvent via heat exchange with the cooled non-permeate in a solvent chiller to produce a heated non-permeate; and

treating a gas using the solvent in a gas treatment unit.

15. The method of claim 14 , comprising:

generating a permeate in the hydrogen separation system;

receiving the permeate in a pressure swing adsorption (PSA) system;

generating a tail gas and a hydrogen-rich stream in the PSA system; and

compressing the tail gas in a compressor to generate a compressed tail gas.

16. The method of claim 15 , comprising mixing the compressed tail gas and the cooled non-permeate using a mixer to generate a fuel mixture.

17. The method of claim 15 , comprising driving the compressor with power generated with the expander.

18. The method of claim 14 , comprising cooling an untreated syngas via heat exchange with the heated non-permeate in a non-permeate heat exchanger.

19. The system of claim 1 , comprising a gas turbine engine configured to receive the heated non-permeate from the solvent chiller.

20. The method of claim 14 , comprising receiving the heated non-permeate in a gas turbine engine.